Sanyo Xacti VPC-C40, Руководство по обслуживанию

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ASIC,
memory
CCD
8 bit
CPU
LCD
MONITOR
Power voltage
Power OFF
Play back
LCD finder
3.3 V 1.2 V
5 V (A)
+12 V etc.
3.2 V
(ALWAYS)
3.3 V (L)
+12 V etc.
OFF OFF 32KHz OFF
OFF
OFF
32KHz OFF
ON ON
4 MHz ON
ON
OFF 4 MHz ON
Table 5-3. Camera Mode
Note) 4 MHz = Main clock operation, 32 kHz = Sub clock operation
4. Power Supply Control
The 8-bit microprocessor controls the power supply for the overall system.
The following is a description of how the power supply is turned on and off. When the battery is attached, a regulated 3.2 V
voltage is normally input to the 8-bit microprocessor (IC301) by IC302, so that clock counting and key scanning is carried out
even when the power switch is turned off, so that the camera can start up again. When the battery is removed, the 8-bit micro-
processor operates in sleep mode using the backup lithum battery. At this time, the 8-bit microprocessor only carries out clock
counting, and waits in standby for the battery to be attached again. When a switch is operated, the 8-bit microprocessor supplies
power to the system as required.
The 8-bit microprocessor first sets the P ON signal at pin (40) to high, and then turns on the DC/DC converter. After this, low
signals are output from pin (17) so that the ASIC is set to the reset condition. After this these pins set to high, and set to active
condition. If the LCD monitor is on, the LCD ON 1 signal at pin (22) set to high, and the DC/DC converter for the LCD monitor is
turned on. Once it is completed, the ASIC returns to the reset condition, all DC/DC converters are turned off and the power
supply to the whole system is halted.
Power switch ON-
Auto power OFF
CAMERA
Table 5-2. Key Operation
3. Key Operaiton
For details of the key operation, refer to the instruction manual.
1
2
0
1 2
3
SCAN
OUT
SCAN
IN
←
LEFT
REC
↓
DOWN
1st SHUTTER
↑
UP
3
4
SET
2nd SHUTTER
→
RIGHT
WIDE TELE
5
MENU
CAMERA
6
LCD LOTATION
PLAY
POWER ON
PANEL OPEN
0
- -
- TEST
-
- -
- -
-
-
-